From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Charles C. Berry" <ccberry@ucsd.edu>
Subject: Re: Latex code before maketitle
Date: Wed, 11 Feb 2015 16:24:41 -0800
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To: Jacob Gerlach <jacobgerlach@gmail.com>
Cc: Org-mode <emacs-orgmode@gnu.org>

On Wed, 11 Feb 2015, Jacob Gerlach wrote:

> Hi List,
>
> I am using a custom Latex class that requires some code between
> \begin{document} and \maketitle.
>
> It seems from looking at ox-latex.el that there is nothing between document
> start and title command available for me to customize.
>
> I suppose I could customize the title command to include the extra code,
> but I'd like to find an alternate approach if possible so I don't have to
> manage org-latex-title-command on a per-document basis.
>
> Are there any convenient alternatives?

(info "(org) Advanced configuration") has a heading called 'Filters' that 
may interest you.

If you always export that custom class using the same boilerplate between 
the \begin{document} and the \maketitle , you can install 
your own `final-output' filter. All it needs to do is check if the custom 
class is operative and if it is insert the needed text before \maketitle.

As a start, put something like this in your init file:


#+BEGIN_SRC emacs-lisp :exports results :results none
   (defun my-final-filter (s backend info)
     (when (eq backend 'latex)
       (let ((class (plist-get info :latex-class)))
         (message "class: %s" class)
         (when (string= class "report")
           (replace-regexp-in-string "\\maketitle"
                                     "% put special stuff here\n\\maketitle"
                                     s nil t)))))

   (add-to-list 'org-export-filter-final-output-functions 'my-final-filter)
#+END_SRC


Change "report" to your special class and the % comment to whatever 
you need.

To make it more robust, you might want to fiddle with the regexp in case 
there is a \maketitle someplace else in your document.

HTH,

Chuck